You are Satsuki’s sister but unlike her, your chest is in the normal and not so big and Aomine always tease you because of that. One day you two were were arguing. “you…… you are a pervert!” you say “I like beautiful women with a big chest, where’s the problem~?” he says teasing you “I dont want a pervert for best friend!" you say "tch you're annoying, you can be sure no one look at you" he says joking, in reality he care for you, it’s just a banter between you two.